Easy ways of adding two numbers without using arithmetic operator ‘+’ in C

Here are few ways using which addition can be performed without the use of arithmetic operator ‘+’.1. Recursionint add(int, int);
int main() {
int num1, num2;

printf(“nEnter the two Numbers : “);
scanf(“%d %d”, &num1, &num2);

printf(“nAddition of two num is : %d”, add(num1, num2));
return (0);
}

int add(int num1, int num2) {
if (!num1)
return num2;
else
return add((num1 & num2) << 1, num1 ^ num2);
}2. Looping 1int main() {
int num1 = 10, num2 = 5, i;

while (num2 > 0) {
num1++;
num2–;
}

printf(“%d”, num1);
return (0);
}3. Looping 2int main() {
int num1 = 10, num2 = 5, i;

while (num2–) {
num1++;
}

printf(“Sum is : %d”, num1);
return (0);
}4. Looping 3int sum(int, int);
int main() {
int a, b;

printf(“Enter the two Numbers: “);
scanf(“%d %d”, &a, &b);

printf(“Addition of two num. is : %d”, add(a, b));
return(0);
}

int add(int num1, int num2) {
int i;
for (i = 0; i < num2; i++)
num1++;
return num1;
}5. Using Subtraction for Addition!int main() {
int num1 = 10, num2 = 5;

num1 = num1 – (-num2);
printf(“Sum is : %d”,num1);

return (0);
}I hope this note would be helpful to all. Do share your views and comments.Note: Header files are not included in above code.

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